Chairman of the Board, Earth Corporation
Other assets (est.): the sum of each year's after-tax income (pay + dividends in own name − estimated taxes and social insurance) dividends retained by asset-management companies (less about 20% corporate tax), and proceeds from share sales (the drop in shares from the previous year × share price, less 20.315% tax, or about 30% for asset-management companies), for the years we have data. Spending, real estate, donations and savings from earlier years are not reflected.
Asset-management companies: Otsuka Chemical Co., Ltd.est., Otsuka Pharmaceutical Factory Co., Ltd.est., Otsuka Estate Co., Ltd.est., Otsuka Pharmaceutical Co., Ltd.est. (their holdings are included in net worth)
| Company | Held by | Shares | Stake | Price | Value | Dividends |
|---|---|---|---|---|---|---|
| Earth Corporation 4985 · FY ending Dec 2025 |
Otsuka Pharmaceutical Co., Ltd. | 2,200,000 | 10.06% | ¥4,968 | ¥10.9B | ¥275M |
| Earth Corporation 4985 · FY ending Dec 2025 |
Otsuka Pharmaceutical Factory Co., Ltd. | 1,948,000 | 8.91% | ¥4,968 | ¥9.7B | ¥244M |
| The Awa Bank,Ltd. 8388 · FY ending Mar 2026 |
Otsuka Pharmaceutical Factory Co., Ltd. | 1,585,000 | 3.99% | ¥5,687 | ¥9.0B | ¥226M |
| The Awa Bank,Ltd. 8388 · FY ending Mar 2026 |
Otsuka Pharmaceutical Co., Ltd. | 932,000 | 2.34% | ¥5,687 | ¥5.3B | ¥133M |
| Earth Corporation 4985 · FY ending Dec 2025 |
Otsuka Chemical Co., Ltd. | 400,000 | 1.83% | ¥4,968 | ¥2.0B | ¥50.0M |
| Earth Corporation 4985 · FY ending Dec 2025 |
Otsuka Estate Co., Ltd. | 239,000 | 1.09% | ¥4,968 | ¥1.2B | ¥29.9M |
| OAT Agrio Co., Ltd. 4979 · FY ending Dec 2025 |
Otsuka Chemical Co., Ltd. | 516,000 | 5.12% | ¥2,159 | ¥1.1B | ¥31.0M |
| Earth Corporation 4985 · FY ending Dec 2025 · Chairman of the Board |
Own name | 157,400 | — | ¥4,968 | ¥782M | ¥19.7M |
| Akebono Brake Industry Co.,Ltd. 7238 · FY ending Mar 2026 |
Otsuka Chemical Co., Ltd. | 1,630,000 | 0.60% | ¥117 | ¥190M | — |
| Year | Net worth | Pay | Dividends | Total income | Taxes (est.) | After tax (est.) | Share sales (after tax) |
|---|---|---|---|---|---|---|---|
| 2026 | ¥14.5B | — | ¥359M | ¥359M | ¥0 | ¥0 | — |
| 2025 | ¥33.0B | ¥177M | ¥888M | ¥1.1B | ¥102M | ¥93.0M | — |
| 2024 | ¥35.6B | ¥146M | ¥810M | ¥956M | ¥83.7M | ¥78.8M | — |
| 2023 | ¥27.2B | ¥143M | ¥709M | ¥852M | ¥81.7M | ¥77.1M | — |
Grouped by the calendar year of each company's fiscal year-end. Years in which the person was not among the top 10 shareholders of a company exclude that company.
Estate ¥28.0B = listed shares in own name ¥782M + shares held via asset-management companies ¥24.8B (value ¥39.4B less 37% corporate tax on unrealized gains) + other assets (est.) ¥2.4B
Total inheritance tax paid: ¥7.6B (27.1% of the estate).
| Heir | Inherits | Tax | After tax |
|---|---|---|---|
| Spouse | ¥14.0B | ¥0 | ¥14.0B |
| Each child | ¥7.0B | ¥3.8B | ¥3.2B |
Japanese inheritance tax, assuming the estate is split in statutory shares. A spouse pays no tax up to ¥160M or the statutory share, whichever is larger. Family size is not in the securities reports, so you can choose it (with no children, parents or siblings also become heirs, so the real figure differs). Business-succession deferrals, lifetime gifts, donations to foundations, debts and other reliefs are not reflected.